i am in class 12 and want to pursue a career in B.Tech(IT).which are the best goverment institutes in india and how do i get into them?i also want to know future job prospects in this line.how do i prepare for these entrance exams?

The best Government institutes are IITs and IISc apart from that you can opt NITs which have good reputation The general process is appearing for IIT-JEE for which you should be first attempt with min 65% in PCM also you can attempt the IIT JEE maximum 2 times